%0 Journal Article %A Ya. I. Mekler %T Constituents sufficient for a safe operation of relay contact circuits %J Doklady Akademii Nauk %D 1957 %P 613-615 %V 117 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_117_4_a17/ %G ru %F DAN_1957_117_4_a17